Gas in the Planet-Forming Region of Circumstellar Disks: Exploiting the Mid-IR Molecular Forest

恒星盘行星形成区域中的气体：利用中红外分子森林

• 批准号: 1109857
• 负责人: Geoffrey Blake
• 金额: $ 43.78万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109857&HistoricalAwards=false
• 关键词: Gas; Planet; Forming; Region; Circumstellar

Dr. Blake and his team study the chemistry and physics of the innermost regions (0.5-50 AU) of very young circumstellar disks. The project uses of ground-based (Keck-NIRSPEC, VLT-CRIRES, Gemini-MICHELLE) spectroscopy and spectro-astrometry of accretion disks. The rovibrational line emissions of the molecules CO, HCN, C2H2, H2O, OH, and other molecules are used to constrain the physical and chemical structure and evolution of the protoplanetary disks' inner regions. These observations are interpreted with 2D (axisymetric) and 3D radiative transfer models. In order to derive accurate molecular abundances, the group will extend their radiative transfer codes to generate non-local thermodynamic equilibrium level populations relevant for IR transitions. Further studies are planned for the outer disks using far IR and submm lines from Herschel and potentially ALMA. The project provides training for a PhD student and postdoc.

布莱克博士和他的团队研究非常年轻的星周盘最内部区域（0.5-50 AU）的化学和物理。该项目使用吸积盘的地基（Keck-NIRSPEC、VLT-CRIRES、Gemini-MICHELLE）光谱和光谱天体测量。 CO、HCN、C2H2、H2O、OH和其他分子的旋转振动线发射被用来约束原行星盘内部区域的物理和化学结构以及演化。这些观测结果用 2D（轴对称）和 3D 辐射传输模型进行解释。为了获得准确的分子丰度，该小组将扩展其辐射转移代码以生成与红外跃迁相关的非局部热力学平衡水平群体。计划使用赫歇尔和潜在的 ALMA 的远红外和亚毫米线对外盘进行进一步的研究。该项目为博士生和博士后提供培训。